A 57-year-old male asked:
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can two b+ parents make an o+ baby .

1 doctor answer
Dr. Lauren Stegman
26 years experience Radiation Oncology
Absolutely : Absolutely possible. There are many goo websites thy explain the genetics of blood types. I've listed on below. The chance of two blood type b parents having a an o child is 6.25% overall, but goes up to 25% if both parents are known to be type bo and not bb. Since it is possible for this to occurr the only way to determine paternity would be a dna or to determine tht the presumed father is blood type bb and not bo. I don't mean to b too presumptuous, but if you are asking this question about your own child, it sounds like there are some trust issues in your relationship that might need to be addressed before or if they become a major problem.
Answered on Oct 3, 2016

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